Wait around altar finally for her? (5)
I believe the answer is:
bride
'her?' is the definition.
'wait around altar finally' is the wordplay.
'wait' becomes 'bide' (I've seen this before).
'around' indicates putting letters inside.
'finally' suggests the final letters.
The final letter of 'altar' is 'r'.
'bide' enclosing 'r' is 'BRIDE'.
'for' acts as a link.
(Other definitions for bride that I've seen before include "Female at match" , "The Woman In White, perhaps?" , "Wife of groom" , "new union member" , "She's just about to be married" .)